Add log dependency back for guest environments and fix conversions

Co-authored-by: jsturtevant <[email protected]>

Author: Copilot

Cargo.lock

@@ -18,6 +18,9 @@ use anyhow::{Error, Result, bail};
 #[cfg(feature = "tracing")]
 use tracing::{Span, instrument};
 
+#[cfg(feature = "std")]
+extern crate log;
+
 use crate::flatbuffers::hyperlight::generated::LogLevel as FbLogLevel;
 
 // Define a minimal Level enum for conversions.
@@ -122,3 +125,18 @@ impl From<Level> for LogLevel {
         }
     }
 }
+
+// Conversion from log::Level (which guest logger uses) to LogLevel
+// Only available when std feature is enabled (for guest environments)
+#[cfg(feature = "std")]
+impl From<log::Level> for LogLevel {
+    fn from(val: log::Level) -> LogLevel {
+        match val {
+            log::Level::Trace => LogLevel::Trace,
+            log::Level::Debug => LogLevel::Debug,
+            log::Level::Info => LogLevel::Information,
+            log::Level::Warn => LogLevel::Warning,
+            log::Level::Error => LogLevel::Error,
+        }
+    }
+}

src/hyperlight_common/src/flatbuffer_wrappers/guest_log_level.rs

@@ -27,6 +27,7 @@ hyperlight-common = { workspace = true, default-features = false }
 hyperlight-guest-tracing = { workspace = true, default-features = false }
 hyperlight-guest-macro = { workspace = true, default-features = false, optional = true }
 buddy_system_allocator = "0.11.0"
+log = { version = "0.4", default-features = false }
 linkme = { version = "0.3.35", optional = true }
 spin = "0.10.0"
 flatbuffers = { version = "25.2.10", default-features = false }

src/hyperlight_guest_bin/Cargo.toml

@@ -8,6 +8,7 @@ hyperlight-guest = { path = "../../../hyperlight_guest" }
 hyperlight-guest-bin = { path = "../../../hyperlight_guest_bin" }
 hyperlight-common = { path = "../../../hyperlight_common", default-features = false }
 hyperlight-guest-tracing = { path = "../../../hyperlight_guest_tracing" }
+log = {version = "0.4", default-features = false }
 tracing = { version = "0.1.41", default-features = false, features = ["log", "attributes"] }
 
 [features]